Simplifying the design and programming of
spatially enhanced audio systems for multispeaker portable
products, the LM48901 quad Class D spatial array features an
edge-rate-controled PWM architecture. The chip aids tablet/laptop
computer audio that is hindered by tightly spaced speakers and
audio that lacks clarity and depth. The chip, along with companion
software, solves this problem with easy-to-use audio effect
programming that converts a small soundstage into an immersive
sound experience with two to 16 speakers.

The IC also has a spatial-processing DSP, four
Class D amplifiers, an 18-bit stereo A/D converter, a PLL, and
I2S and I2C interfaces. Output power is 1.7 W
typ with RL = 8 Ω and
THD+N ≤ 10%. The chip’s THD+N is 0.06% typ and
PSRR at 217 Hz is 71 dB typ. Shutdown current is just 1 μA
typ. ($2.50 ea/1,000 — available now.)